MMA-Training.com

When joint locks are done correctly, the opponent will have to submit or risk injury to the joint which is being attacked.
The term joint lock refers to bringing the joint to its maximum range of motion at which point it would be “locked”. Any movement beyond that point will hyperextend or hyperrotate the joint and [...]

You have one of the many choke holds locked in tight. Your opponent then makes the choice to tap out or pass out.
Most choose the first option. Those who don’t will go unconscious in a matter of seconds.
These mma submission holds work because they cut-off the blood flow to the brain by

When MMA Submission Holds are applied correctly, the opponent will be forced to submit due to pain or fear of injury.
If you wish to compete in MMA then it is essential to learn a variety of submissions.
Even if you do not plan to use them to finish your opponent, you will need to be familiar [...]